ITI/NCVT Mason Building Constructor (AITT Theory)
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ExploreAbout this exam
The ITI/NCVT Mason Building Constructor AITT Theory paper is the trade theory assessment taken by trainees who have completed the Mason (Building Constructor) course at an Industrial Training Institute under the Craftsman Training Scheme. It tests whether you understand the trade, not just whether you can perform it on site: the properties of bricks, blocks, cement and aggregate; how mortar and concrete are proportioned and cured; how walls are bonded and corners raised; how buildings are set out, levelled and marked; how foundations, arches, lintels, stairs and roofs go together; and how floors and tiles are laid and finished. Around that technical core sit smaller sections on trade safety and environment, estimation and measurement, repair and waterproofing, and employability skills. Questions are multiple choice, delivered on computer or on an OMR sheet depending on your state's arrangement, and offered in the language of instruction. Preparation works best in layers: master trade terminology in English as well as your own language, because question wording often hinges on a single technical term; revise from your institute's prescribed trade theory and workshop calculation books; then practise objective questions until definitions, standard proportions and tool names are automatic. The official NCVT/DGT sources publish the current syllabus, question pattern and all administrative figures, so confirm details there rather than relying on hearsay.
What you'll study
About ITI/NCVT Mason Building Constructor (AITT Theory) preparation
What is the AITT theory paper actually testing?
Trade knowledge you should already have from two years of workshop practice: material properties, mortar and concrete mixes, brick bonds, setting out and levelling, structural elements, finishing, plus safety and estimation. It rewards precise terminology more than calculation speed, so learn exact definitions and standard proportions.
How many questions are there and how long do I get?
The official NCVT/DGT sources set and publish the current question count and duration, and these are revised from time to time. Do not rely on numbers passed around by seniors. Check the current AITT notification or your institute's exam cell for the authoritative figure.
Is the paper hard?
Most candidates find it moderate. The technical core is predictable if you have attended theory classes, but marks are lost on fine distinctions, such as English and Flemish bonds, or the difference between a queen closer and a half bat. Objective practice fixes those distinctions quickly.
Can I take the exam in Hindi or my regional language?
The paper is offered in the language of instruction, and NCVT arrangements commonly include Hindi and English alongside regional languages where provided. Confirm the language options available at your centre when you fill the examination form, because availability varies by state.
What happens if I fail one paper?
AITT has separate theory and practical components, and candidates who fail a component normally reappear in the next scheduled examination for that component only. The exact rules on supplementary attempts and marks carry-forward are set by NCVT/DGT, so verify the current position with your institute.
In what order should I revise?
Start with materials, tools and masonry bonds, since they underpin everything else. Then take mortar, concrete and plastering, followed by setting out and levelling, foundations and structural elements. Finish with arches, stairs, flooring, estimation, repair and employability skills, which are lighter and easier to hold late.
What are the most common mistakes candidates make?
Confusing mortar and concrete proportions, mixing up bond names, misidentifying tools and their uses, and guessing on curing periods and plaster thicknesses. Another frequent loss is skim-reading a question that says 'not' or 'except'. Slow down on short questions and read every option.
How should I practise objective questions?
Answer without looking at notes, then mark every wrong answer with the correct fact written beside it. Revise those notes weekly rather than re-reading the whole book. Keep a single sheet of standard numbers, such as mix ratios, curing days and nominal sizes, and review it daily.
Where do I confirm exam dates, fees and results?
Only through official NCVT/DGT channels and your own institute. This page is independent study material and is not affiliated with NCVT or DGT. Fees, dates, admit cards and results are published by the official bodies, so treat any figure you hear informally as unverified.